Hooking up asm-wasm conversion.

src/typing-asm.cc

Index: src/typing-asm.cc
diff --git a/src/typing-asm.cc b/src/typing-asm.cc
index 2390e7e7b12a824229e8d68768896c35791836d4..b2cc070f8a9d36751e38a4c1e5b5b99a55096e2e 100644
--- a/src/typing-asm.cc
+++ b/src/typing-asm.cc
@@ -44,6 +44,7 @@ AsmTyper::AsmTyper(Isolate* isolate, Zone* zone, Script* script,
       root_(root),
       valid_(true),
       allow_simd_(false),
+      fixed_signature_(false),
       property_info_(nullptr),
       intish_(0),
       stdlib_types_(zone),
@@ -86,6 +87,11 @@ void AsmTyper::VisitAsmModule(FunctionLiteral* fun) {
   if (!use_asm_literal->raw_value()->AsString()->IsOneByteEqualTo("use asm"))
     FAIL(fun, "missing \"use asm\"");
 
+  // TODO(bradnelson): Generalize this.
+  if (fixed_signature_ && scope->num_parameters() != 3) {
+    FAIL(fun, "only 3 parameter modules supported");
+  }
+
   // Module parameters.
   for (int i = 0; i < scope->num_parameters(); ++i) {
     Variable* param = scope->parameter(i);